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<p class="Decl"><b>procedure</b> Changed;</p>
<p class="Decl"><span class="EmptyRef">procedure</span> Changed(const Rect: <a href="../../../../GR32/Types/Rectangle%20Types.htm#TRect">TRect</a>); </p>
<h2>Description</h2>
<p class="Body">Will mark the layer for update and calls the <a href="../../../../GR32/Classes/TNotifiablePersistent/Events/OnChange.htm">OnChange</a> event, provided the change notification is not masked with <a href="../../../../GR32/Classes/TNotifiablePersistent/Methods/BeginUpdate.htm">BeginUpdate</a>. If a rectangle of the changed area (<span class="EmptyRef">Rect</span>) is set, only this area will be updated - provided the <a href="../../../../GR32_Image/Classes/TCustomPaintBox32/Properties/RepaintMode.htm">RepaintMode</a> of the <a href="../../TLayerCollection/Properties/Owner.htm">owning</a> <a href="../../../../GR32_Image/Classes/TCustomImage32/_Body.htm">TCustomImage32</a> instance is set to <a href="../../../../GR32_Image/Types/TRepaintMode.htm">rmOptimizer</a>.</p>
<p id="hidden">[See also]: <a href="../../../../../Additional%20Topics/Using%20TImage32/Using%20Layers.htm">Using 
  Layers</a>, <a href="Update.htm">Update</a> </p>
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